13972| 19
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物體在線性導(dǎo)軌上滑動(dòng),,所需推力如何計(jì)算 |
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點(diǎn)評(píng)
對(duì)的
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點(diǎn)評(píng)
加速是勻加速嗎?減速是勻減速嗎,?
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